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<?php $strings = [ "A12B8Y9CC10", "V5C8I17", "KK18II9", "I8VV22ZZ4S9U2", "A18Z12I" ]; $pattern = '/[A-Z]{2,}\d+(*SKIP)(*FAIL)|[A-Z](\d+)/'; foreach ($strings as $string) { preg_match_all($pattern, $string, $matches); print_r($matches[1]); }
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 12 [1] => 8 [2] => 9 ) Array ( [0] => 5 [1] => 8 [2] => 17 ) Array ( ) Array ( [0] => 8 [1] => 9 [2] => 2 ) Array ( [0] => 18 [1] => 12 )

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